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Shanghai Orders Cars Off Roads as Pollution Exceeds Scale

Shanghai ordered vehicles off the road and factories to cut production after pollution reached hazardous levels, as Hong Kong announced plans to introduce an air quality index that assesses health risks from smog.

A heavy fog shrouding Shanghai caused widespread flight cancellations and sent an air quality index monitored by the U.S. consulate in the city surging past 500 to the “beyond index” category. Hong Kong’s air pollution index reached “very high” levels at three roadside monitors, according to its Environment Protection Department.